I've totally forgotten about this (WIP CPL apps doesn't start).
It was reported earlier.
I have no idea what's wrong, but 8600GT is capable only of FL10.0, maybe that.
Experimentally I limited the max DX feature level, for myself, to 10.0 in DX CPL but the app worked, detected FL10.0 as a max output API, as expected.
I guess the process vanishes right after its launch from the process list if you have a look into task manager.
If it does then it must be a silent crash.
If it doesn't the it stucks at some point.
I don't know how to check it. Do you have an Visual Studio installed, to launch it from that and see what happens? 😊
I have my old 8600GT hiding somewhere, I could put it into the Win7 machine to try it out.